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1. (WO2017040208) FLOW SENSOR SYSTEM WITH ABSORBER

Pub. No.:    WO/2017/040208    International Application No.:    PCT/US2016/048719
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Fri Aug 26 01:59:59 CEST 2016
IPC: A61M 5/168
A61M 5/172
G01F 1/66
Applicants: CRISI MEDICAL SYSTEMS, INC.
Inventors: DEKALB, Shawn, Wayne
Title: FLOW SENSOR SYSTEM WITH ABSORBER
Abstract:
A flow sensor sub-assembly for sensing flow of a fluidic medicament includes a flow tube having a flow tube inlet and a flow tube outlet, and an acoustical transmission rate. The medicament flows through the flow tube. A first piezo element is arranged at an upstream position of the flow tube and a second piezo element is arranged at a downstream position of the flow tube, such that the first piezo element and the second piezo element are mounted apart a pre-selected distance from each other. An absorber sheath encircles the flow tube. The absorber sheath has an upstream end and a downstream end. The absorber sheath is comprised of a material with an acoustical transmission rate different than the flow tube.